[Transformation products of vitamin E and its analog--chroman C1 in an oxidizing ethyl linoleate medium]. / Produkty transformatsii vitamina E i ego analoga--chromana C1 v srede okisliaiushchegosiia étillinoleata.

Spirodimers, dimers, quinones of alpha-tocopherol and chroman C1 have been synthesized by the alpha-tocopherol and chroman Ci oxidation with K3[Fe(CN)6] and FeCl3. Products of the oxidative transformation of alpha-tocopherol and chroman Ci, viz. dimers, quinones and trimers, in the media of ethyllinoleate and nonane have been identified by HPLC, TLC, UV, IR and 1H NMR spectroscopy. The mechanism of the transformation and modifying activity of chromans under various oxidation conditions are discussed with regards to the experimental data.

[Synthesis and antioxidative activity of structural analogs of vitamin E]. / Sintez i antiokislitel'naia aktivnost' strukturnykh analogov vitamina E.

Analogues of alpha-tocopherol with modified structure of side isoprenoid chain and chroman nucleus have been synthesised. The influence of chromanol structure on the dynamic of oxidation products formation have been investigated on models of induced and noninduced bulk-phase peroxidation of ethyl linoleate in presence of 2.3.10(-3)-1.2.10(-2) M alpha-tocopherol and the synthesised compounds.